ServiceWorker

15783a11 - Add a link to web-platform-tests to the top of the spec (#1129)

Add a link to web-platform-tests to the top of the spec (#1129) * Remove trailing whitespace * Add a link to web-platform-tests to the top of the spec A few other specs that have something similar: https://fetch.spec.whatwg.org/ https://w3c.github.io/IndexedDB/ https://notifications.spec.whatwg.org/ https://xhr.spec.whatwg.org/